Lawrence: Trump never tells the truth, except about protecting billionaires

Tonight on The Last Word: The cost of living it a top issue for voters amid rising prices. Also, Democrats prepare for possible legal action on Trump’s election attacks. Plus, David Crowley makes the cost of living central to his gubernatorial campaign in Wisconsin. And seven House Republicans vote against Trump’s Iran war. Sen. Ed Markey, Garrett Epps, David Crowley, and Iowa State Sen. Sarah Trone Garriott join Lawrence O’Donnell.